New, Improved version of VB.Net Registration System. It sends emails to alert you when someone registers your program, if they try to use a used key, and if they try to use a banned key/their key has been banned. Checks every time against ban list.
Secure P2P Instant Messenger running on .NET Framework 2.0. Uses server to store user information (user name, password, email address, friends list, log in state, IP address) in encrypted form. Uses custom designed symmetric encryption algorithm.